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Synthesis of novel imidazo[1,2‐ a ][3,1]benzothiazines 4, imidazo[1,2‐ a ]‐[1,2,4]benzotriazines 5, and 4 H ‐imidazo[2,3‐ c ]pyrido[2,3‐ e ][1,4]oxazines 6
Author(s) -
Gauthier Jean,
Duceppe Jean Simon
Publication year - 1984
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570210432
Subject(s) - chemistry , benzothiazine , ethyl ester , bicyclic molecule , carboxylic acid , stereochemistry , medicinal chemistry , organic chemistry
Starting from the readily available 2‐aminobenzhydrols ( 7 ), 3‐amino‐1,2,4‐benzotriazine ( 11 ) and 2‐amino‐3‐pyridinol ( 12 ), novel derivatives of 5‐phenyl‐5 H ‐imidazo[1,2‐ a ][3,1]benzothiazine‐2‐carboxylic acid, ethyl ester ( 4 ), imidazo[2,1‐ c ][1,2,4]benzotriazine‐2‐carboxylic acid, ethyl ester ( 5 ) and 4 H ‐imidazo[2,3‐ c ]pyrido‐[2,3‐ e ][1,4]oxazine ( 6 ) were prepared.